public static IEnumerable <IGraphElementModel> DeleteElements(this IGraphModel self, IReadOnlyCollection <IGraphElementModel> graphElementModels)
{
var stickyNoteModels = new HashSet <IStickyNoteModel>();
var placematModels = new HashSet <IPlacematModel>();
var variableDeclarationsModels = new HashSet <IVariableDeclarationModel>();
var edgeModels = new HashSet <IEdgeModel>();
var nodeModels = new HashSet <INodeModel>();
foreach (var element in graphElementModels)
{
switch (element)
{
case IStickyNoteModel stickyNoteModel:
stickyNoteModels.Add(stickyNoteModel);
break;
case IPlacematModel placematModel:
placematModels.Add(placematModel);
break;
case IVariableDeclarationModel variableDeclarationModel:
variableDeclarationsModels.Add(variableDeclarationModel);
break;
case IEdgeModel edgeModel:
edgeModels.Add(edgeModel);
break;
case INodeModel nodeModel:
nodeModels.Add(nodeModel);
break;
}
}
// Add nodes that would be backed by declaration models.
nodeModels.AddRangeInternal(variableDeclarationsModels.SelectMany(d => self.FindReferencesInGraph <IHasDeclarationModel>(d).OfType <INodeModel>()));
// Add edges connected to the deleted nodes.
foreach (var portModel in nodeModels.OfType <IPortNodeModel>().SelectMany(n => n.Ports))
{
edgeModels.AddRangeInternal(self.EdgeModels.Where(e => e.ToPort == portModel || e.FromPort == portModel));
}
return(self.DeleteStickyNotes(stickyNoteModels)
.Concat(self.DeletePlacemats(placematModels))
.Concat(self.DeleteEdges(edgeModels))
.Concat(self.DeleteVariableDeclarations(variableDeclarationsModels, deleteUsages: false))
.Concat(self.DeleteNodes(nodeModels, deleteConnections: false)).ToList());
}
public static IReadOnlyCollection <IGraphElementModel> DeleteEdge(this IGraphModel self, IEdgeModel edgeToDelete)
{
return(self.DeleteEdges(new[] { edgeToDelete }));
}